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Abstract:

The present invention discloses a sub-pixel display structure and a
liquid crystal display panel using the same. The sub-pixel display
structure includes two electrode portions. One of the electrode portions
can perform charge-sharing via a charge-sharing switch. At least one of
the two electrode portions is further connected to an extra electrode
portion. When being used in a 3D liquid crystal display panel having a
patterned phase retarder film, the sub-pixel display structure can
satisfy the requirement of 3D view angle by making the extra electrode
portion to be shielded by black matrix, and the two electrode portions
still remain operatable so that a color washout phenomenon under a large
viewing angle can be reduced even in a 3D liquid crystal display panel.

Claims:

1. A sub-pixel display structure being connected to a first data line, a
first scanning line and a second scanning adjacent to the first scanning
line, and comprising: a primary switch unit being electrically connected
to the first scanning line and the first data line, and the primary
switch unit is driven by the first scanning line; a charge-sharing switch
being electrically connected to the second scanning line, and the
charge-sharing switch is driven by the second scanning line; a first
electrode portion being electrically connected to the primary switch
unit, and the first electrode portion receives a gray scale voltage
transmitted by the first data line when the primary switch unit is
switched on; and a second electrode portion being electrically connected
to the primary switch unit and the charge-sharing switch, wherein the
second electrode portion receives the gray scale voltage transmitted by
the first data line when the primary switch unit is switched on; the
second electrode portion further shares electric charges with a
voltage-dividing capacitor when the charge-sharing switch is switched on
so as to change the gray scale voltage in the second electrode portion;
wherein the first electrode portion is connected to a first extra
electrode portion and electrically connected to the primary switch unit
via the first extra electrode portion; the second electrode portion is
connected to a second extra electrode portion and electrically connected
to the charge-sharing switch via the second extra electrode portion; the
first electrode portion, the second electrode portion, the first extra
electrode portion and the second extra electrode portion are disposed
between the first scanning line and the second scanning line and each of
them corresponds to four liquid crystal domains with different liquid
crystal pretilt angles.

2. The sub-pixel display structure as claimed in claim 1, wherein the
ratio of areas of the first electrode portion and the second electrode
portion is 3:7 or 4:6.

3. A sub-pixel display structure being electrically connected to a first
data line, a first scanning line and a second scanning line adjacent to
the first scanning line, and comprising: a primary switch unit being
electrically connected to the first scanning line and the first data
line, and the primary switch unit is driven by the first scanning line; a
charge-sharing switch being electrically connected to the second scanning
line, and the charge-sharing switch is driven by the second scanning
line; a first electrode portion being electrically connected to the
primary switch unit, and the first electrode portion receives a gray
scale voltage transmitted by the first data line when the primary switch
unit is switched on; and a second electrode portion being electrically
connected to the primary switch unit and the charge-sharing switch,
wherein the second electrode portion receives the gray scale voltage
transmitted by the first data line when the primary switch unit is
switched on; the second electrode portion further shares electric charges
with a voltage-dividing capacitor when the charge-sharing switch is
switched on so as to change the gray scale voltage in the second
electrode portion; wherein at least one of the first electrode portion
and the second electrode portion is connected to an extra electrode
portion; and each of the first electrode portion, the second electrode
portion and the extra electrode portion corresponds to four liquid
crystal domains with different liquid crystal pretilt angles.

4. The sub-pixel display structure as claimed in claim 3, wherein the
first electrode portion, the second electrode portion and the extra
electrode portion are disposed between the first scanning line and the
second scanning line.

5. The sub-pixel display structure as claimed in claim 3, wherein the
first electrode portion is connected to an extra electrode portion and
electrically connected to the primary switch unit via the extra electrode
portion.

6. The sub-pixel display structure as claimed in claim 3, wherein the
second electrode portion is connected to an extra electrode portion and
electrically connected to the charge-sharing switch via the extra
electrode portion.

7. The sub-pixel display structure as claimed in claim 3, wherein the
first electrode portion is connected to a first extra electrode portion
and electrically connected to the primary switch unit via the first extra
electrode portion; and the second electrode portion is connected to a
second extra electrode portion and electrically connected to the
charge-sharing switch via the second extra electrode portion.

8. The sub-pixel display structure as claimed in claim 7, wherein each of
the first electrode portion, the second electrode portion, the first
extra electrode portion and the second extra electrode portion
corresponds to four liquid crystal domains with different liquid crystal
pretilt angles.

9. The sub-pixel display structure as claimed in claim 3, wherein the
ratio of areas of the first electrode portion and the second electrode
portion is 3:7 or 4:6.

10. The sub-pixel display structure as claimed in claim 3, wherein the
primary switch unit is composed of two switches; the first electrode
portion is electrically connected to one of the switches of the primary
switch unit; and the second electrode portion is electrically connected
to the other one of the switches of the primary switch unit.

11. A liquid crystal display panel comprising: a plurality of scanning
lines including a first scanning line and a second scanning line that are
adjacent to each other; a plurality of data lines crossing the scanning
lines and including a first data line; a plurality of sub-pixel display
structures, wherein one of the sub-pixel display structures is
electrically connected to the first data line, the first scanning line
and the second scanning line adjacent to the first scanning line, and
comprises: a primary switch unit being electrically connected to the
first scanning line and the first data line, and the primary switch unit
is driven by the first scanning line; a charge-sharing switch being
electrically connected to the second scanning line, and the
charge-sharing switch is driven by the second scanning line; a first
electrode portion being electrically connected to the primary switch
unit, and the first electrode portion receives a gray scale voltage
transmitted by the first data line when the primary switch unit is
switched on; and a second electrode portion being electrically connected
to the primary switch unit and the charge-sharing switch, wherein the
second electrode portion receives the gray scale voltage transmitted by
the first data line when the primary switch unit is switched on; the
second electrode portion further shares electric charges with a
voltage-dividing capacitor when the charge-sharing switch is switched on
so as to change the gray scale voltage in the second electrode portion;
wherein at least one of the first electrode portion and the second
electrode portion is connected to an extra electrode portion; and each of
the first electrode portion, the second electrode portion and the extra
electrode portion corresponds to four liquid crystal domains with
different liquid crystal pretilt angles.

12. The sub-pixel display structure as claimed in claim 11, wherein the
liquid crystal display panel is a 3D liquid crystal display panel having
a patterned phase retarder film, and the extra electrode portion is
shielded by a black matrix.

[0004] Nowadays the liquid crystal display device manufacturer can produce
liquid crystal display devices having a size larger than 50 inches.
However, large size thin-film transistor liquid crystal display device
has an obvious problem with viewing angle, that is, when a user watch the
screen of the device from different angles, there are differences in
brightness and contrast of the screen. In order to improve the problem of
the thin-film transistor LCD with viewing angle, manufacturers has
proposed various technologies of wide viewing angle, such as multi-domain
vertical alignment (MVA) technology, which effectively increase the
viewing angle of the display device. However, although the MVA technology
can increase the viewing angle, for a large-sized liquid crystal panel, a
problem of color washout will occur at a large viewing angle.

[0005] In order to solve the color washout problem, a conventional
solution is disclosed in FIG. 1. FIG. 1 is a schematic view of a
sub-pixel display structure of a conventional liquid crystal display
panel. The sub-pixel display structure includes a first portion 91, a
second portion 92, a first scanning line 93, a second scanning line 94, a
data line 95, a primary switch unit 96 and a charge-sharing switch 97.
The first portion 91 has four liquid crystal domains with different
liquid crystal pretilt angles. The second portion 92 also has four liquid
crystal domains with different liquid crystal pretilt angles. The first
portion 91 and the second portion 92 are disposed between the first
scanning line 93 and the second scanning line 94. The first scanning line
93 can switch on the primary switch unit 96 that is correspondingly
connected to the first portion 91 and the second portion 92 so that a
liquid crystal capacitor in the first portion 91 and a liquid crystal
capacitor in the second portion 92 can receive a gray scale voltage from
the data line 95 via the primary switch unit 96; the scanning line 94
then switches on the charge-sharing switch 97 so that the liquid crystal
capacitor in the second portion 92 further shares electric charges with a
voltage-dividing capacitor via the charge-sharing switch. Hence, the
liquid crystal capacitor in the first portion 91 and the liquid crystal
capacitor in the second portion 92 have different gray scale voltage and
thereby have different transmittance and then further improve the color
washout phenomenon.

[0006] Another solution is disclosed in FIG. 2. The sub-pixel display
structure in FIG. 2 includes a first portion 81, a second portion 82, a
first data line 83, a second data line 84, a scanning line 85 and a
primary switch unit 86. The primary switch unit 86 and the scanning line
85 is disposed between the first portion 81 and the second portion 82.
The primary switch unit 86 is connected to the first data line 83 and the
second data line 84 and is composed of at least two switches. The
scanning line 85 can switch on the primary switch unit 86 so that the
first data line 83 and the second data line 84 can transmit different
gray scale voltages via the primary switch unit to a liquid crystal
capacitor in the first portion 81 and a liquid crystal capacitor in the
second portion 82, respectively. In this way, the first portion 81 and
the second portion 82 can also have different transmittance to further
reduce color washout phenomenon under large viewing angles.

[0007] With the development of liquid crystal display technology,
manufacturers also develop liquid crystal display panels providing 3D
display function, such as a liquid crystal display panel using a
patterned phase retarder film can have a 3D display function. However,
when the sub-pixel structure in FIG. 1 or in FIG. 2 is adopted in the
liquid crystal display panel having a patterned phase retarder film, an
interval between a sub-pixel structure for displaying left-eye images and
a sub-pixel structure for displaying right-eye images must be widened so
as to avoid image crosstalk. Thus, the sub-pixel structure in FIG. 1 or
in FIG. 2 has to partially dispose black matrix on the pixel portions or
switch off the display function of one of the pixel portions (so as to
act as a black matrix) to satisfy the requirement of 3D viewing angle and
thereby causing the liquid crystal display panel to be unable to solve
the color washout problem under 3D display.

[0008] Therefore, some manufacturers further disclose a sub-pixel display
structure as shown in FIG. 3. The sub-pixel display structure includes a
first portions 71, a second portion 72, a third portion 73, a first data
line 74, a second data line 75, a first scanning line 76, a second
scanning line 77, a primary switch unit 78 and a charge-sharing switch
79. The first scanning line 76 and the primary switch unit 78 are
disposed between the first portion 71 and the second portion 72. The
primary switch unit 78 is composed of three switches. The first scanning
line 76 can switch on the primary switch unit 78 to further make the
liquid crystal capacitor in the first portion 71 to receive a gray scale
voltage inputted by the second data line 75 and make the liquid crystal
capacitors in the second portion 72 and the third portion 73 to receive a
gray scale voltage inputted by the first data line 74. Since the first
date line 74 and the second data line 75 transmit different gray scale
voltages, the first portion 71 and the second portion 72 or the third
portion 73 can have different transmittance to further improve color
washout at large viewing angles under 2D display. Besides, under 3D
display, the first portion 71 can be switched off to act as a black
matrix so as to satisfy the requirement of 3D viewing angle; in the
meantime, the second scanning line 77 can switch on the charge-sharing
switch 79 such that the liquid crystal capacitor in the third portion 73
further shares electric charges with a voltage-dividing capacitor via the
charge-sharing switch 79. In this way the liquid crystal capacitor in the
second portion 72 and the liquid crystal capacitor in the third portion
73 can respectively have different gray scale voltages to have different
transmittance. Hence, the liquid crystal display panel can still reduce
the color washout phenomenon at large viewing angles under 3D display.

[0009] However, the sub-pixel display structure in FIG. 3 has to use two
data lines at the same time, and since the manufacturing cost and power
consumption of a data driving chip (also called source driving chip) is
relatively higher, the sub-pixel display structure in FIG. 3 will
relatively increase the manufacturing cost and power consumption of the
liquid crystal display device.

[0010] Therefore, it is necessary to provide a sub-pixel display structure
and an inspection method using the same to overcome the problems existing
in the conventional technology.

SUMMARY OF THE INVENTION

[0011] In view of the shortcomings of the conventional technology, the
main objective of the invention is to provide a sub-pixel display
structure and a liquid crystal display panel using the same, the
sub-pixel display structure can improve color washout phenomenon no
matter in a 2D liquid crystal display panel or in a 3D liquid crystal
display panel using a patterned phase retarder film.

[0012] In order to achieve the foregoing object of the present invention,
the present invention provides a sub-pixel display structure; the
sub-pixel display structure is electrically connected to a first data
line, a first scanning line and a second scanning line adjacent to the
first scanning line, and comprises:

[0013] a primary switch unit being electrically connected to the first
scanning line and the first data line, and the primary switch unit is
driven by the first scanning line;

[0014] a charge-sharing switch being electrically connected to the second
scanning line, and the charge-sharing switch is driven by the second
scanning line;

[0015] a first electrode portion being electrically connected to the
primary switch unit, and the first electrode portion receives a gray
scale voltage transmitted by the first data line when the primary switch
unit is switched on; and

[0016] a second electrode portion being electrically connected to the
primary switch unit and the charge-sharing switch, wherein the second
electrode portion receives the gray scale voltage transmitted by the
first data line when the primary switch unit is switched on; the second
electrode portion further shares electric charges with a voltage-dividing
capacitor when the charge-sharing switch is switched on so as to change
the gray scale voltage in the second electrode portion;

[0017] wherein at least one of the first electrode portion and the second
electrode portion is connected to an extra electrode portion; and each of
the first electrode portion, the second electrode portion and the extra
electrode portion corresponds to four liquid crystal domains with
different liquid crystal pretilt angles.

[0018] In one embodiment of the present invention, the first electrode
portion, the second electrode portion and the extra electrode portion are
disposed between the first scanning line and the second scanning line.

[0019] In one embodiment of the present invention, the first electrode
portion is connected to an extra electrode portion and electrically
connected to the primary switch unit via the extra electrode portion.

[0020] In one embodiment of the present invention, the second electrode
portion is connected to an extra electrode portion and electrically
connected to the charge-sharing switch via the extra electrode portion.

[0021] In one embodiment of the present invention, the first electrode
portion is connected to a first extra electrode portion and electrically
connected to the primary switch unit via the first extra electrode
portion; and the second electrode portion is connected to a second extra
electrode portion and electrically connected to the charge-sharing switch
via the second extra electrode portion.

[0022] In one embodiment of the present invention, each of the first
electrode portion, the second electrode portion, the first extra
electrode portion and the second extra electrode portion corresponds to
four liquid crystal domains with different liquid crystal pretilt angles.

[0023] In one embodiment of the present invention, the ratio of areas of
the first electrode portion and the second electrode portion is 3:7 or
4:6.

[0024] In one embodiment of the present invention, the primary switch unit
is composed of two switches; the first electrode portion is electrically
connected to one of the switches of the primary switch unit; and the
second electrode portion is electrically connected to the other one of
the switches of the primary switch unit.

[0026] a plurality of scanning lines including a first scanning line and a
second scanning line that are adjacent to each other;

[0027] a plurality of data lines crossing the scanning lines and including
a first data line;

[0028] a plurality of sub-pixel display structures, wherein one of the
sub-pixel display structures is electrically connected to the first data
line, the first scanning line and the second scanning line adjacent to
the first scanning line, and comprises:

[0029] a primary switch unit
being electrically connected to the first scanning line and the first
data line, and the primary switch unit is driven by the first scanning
line;

[0030] a charge-sharing switch being electrically connected to the
second scanning line, and the charge-sharing switch is driven by the
second scanning line;

[0031] a first electrode portion being electrically
connected to the primary switch unit, and the first electrode portion
receives a gray scale voltage transmitted by the first data line when the
primary switch unit is switched on; and

[0032] a second electrode portion
being electrically connected to the primary switch unit and the
charge-sharing switch, wherein the second electrode portion receives the
gray scale voltage transmitted by the first data line when the primary
switch unit is switched on; the second electrode portion further shares
electric charges with a voltage-dividing capacitor when the
charge-sharing switch is switched on so as to change the gray scale
voltage in the second electrode portion;

[0033] wherein at least one of the first electrode portion and the second
electrode portion is connected to an extra electrode portion; and each of
the first electrode portion, the second electrode portion and the extra
electrode portion corresponds to four liquid crystal domains with
different liquid crystal pretilt angles.

[0034] In one embodiment of the present invention, the liquid crystal
display panel is a 3D liquid crystal display panel having a patterned
phase retarder film, and the extra electrode portion is shielded by a
black matrix.

[0035] The present invention further provides another sub-pixel display
structure, the sub-pixel display structure is electrically connected to a
first data line, a first scanning line and a second scanning adjacent to
the first scanning line, and comprises:

[0036] a primary switch unit being electrically connected to the first
scanning line and the first data line, and the primary switch unit is
driven by the first scanning line;

[0037] a charge-sharing switch being electrically connected to the second
scanning line, and the charge-sharing switch is driven by the second
scanning line;

[0038] a first electrode portion being electrically connected to the
primary switch unit, and the first electrode portion receives a gray
scale voltage transmitted by the first data line when the primary switch
unit is switched on; and

[0039] a second electrode portion being electrically connected to the
primary switch unit and the charge-sharing switch, wherein the second
electrode portion receives the gray scale voltage transmitted by the
first data line when the primary switch unit is switched on; the second
electrode portion further shares electric charges with a voltage-dividing
capacitor when the charge-sharing switch is switched on so as to change
the gray scale voltage in the second electrode portion;

[0040] wherein the first electrode portion is connected to a first extra
electrode portion and electrically connected to the primary switch unit
via the first extra electrode portion; the second electrode portion is
connected to a second extra electrode portion and electrically connected
to the charge-sharing switch via the second extra electrode portion; the
first electrode portion, the second electrode portion, the first extra
electrode portion and the second extra electrode portion are disposed
between the first scanning line and the second scanning line and each of
them corresponds to four liquid crystal domains with different liquid
crystal pretilt angles.

[0041] In one embodiment of the present invention, the ratio of areas of
the first electrode portion and the second electrode portion is 3:7 or
4:6.

[0042] The present invention is to provide a sub-pixel display structure
having a first electrode portion and a second electrode portion, wherein
the second electrode portion can share electric charges with a
voltage-diving capacitor via a charge-sharing switch, and at least one of
the two electrode portions is further connected to an extra electrode
portion. When the sub-pixel display structure is implemented in a 3D
liquid crystal display panel having a patterned phase retarder film, the
manufacturer only needs to use a black matrix to shield the extra
electrode portion to satisfy the requirement of 3D viewing angle to lower
crosstalk phenomenon of left-eye and right-eye images; in the meantime
the first electrode potion and the second electrode portion can remain
operatable so that a color washout phenomenon under large viewing angles
can also be reduced even when the sub-pixel display structure is used in
a 3D liquid crystal display panel.

BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG. 1 is a schematic view of a sub-pixel display structure of a
conventional liquid crystal display device;

[0044]FIG. 2 is a schematic view of another sub-pixel display structure
of a conventional liquid crystal display device;

[0045]FIG. 3 is a schematic view of still another sub-pixel display
structure of a conventional liquid crystal display device;

[0046]FIG. 4A is a schematic view of a first embodiment of a sub-pixel
display structure in accordance with the present invention;

[0047]FIG. 4B is a schematic view of a second embodiment of the sub-pixel
display structure in accordance with the present invention;

[0048]FIG. 4c is a schematic view of a third embodiment of the sub-pixel
display structure in accordance with the present invention;

[0049]FIG. 5A is a schematic view of the sub-pixel display structure in
FIG. 4A when being implemented for 3D display;

[0050]FIG. 5B is a schematic view of the sub-pixel display structure in
FIG. 4B when being implemented for 3D display; and

[0051]FIG. 5c is a schematic view of the sub-pixel display structure in
FIG. 4c when being implemented for 3D display.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0052] The foregoing objects, features and advantages adopted by the
present invention can be best understood by referring to the following
detailed description of the preferred embodiments and the accompanying
drawings. Furthermore, the directional terms described in the present
invention, such as upper, lower, front, rear, left, right, inner, outer,
side and etc., are only directions referring to the accompanying
drawings, so that the used directional terms are used to describe and
understand the present invention, but the present invention is not
limited thereto.

[0053] With reference to FIG. 4A, FIG. 4A is a schematic view of a first
embodiment of a sub-pixel display structure in accordance with the
present invention. The sub-pixel display structure of the present
invention can be implemented in a liquid crystal display panel. The
liquid crystal display panel may be a 2D liquid crystal display panel or
a 3D liquid crystal display panel having a patterned phase retarder film.
When the sub-pixel display structure of the present invention is
implemented in the liquid crystal display panel, the liquid crystal
display panel may include a plurality of scanning lines, a plurality of
data lines crossing the scanning lines, and a plurality of said sub-pixel
display structures. For the embodiment of FIG. 4A, the scanning lines
include a first scanning line G1 and a second scanning line G2 that is
adjacent to the first scanning line G1 and the data line includes a first
data line D1; wherein one of the sub-pixel display structure is
electrically connected to the first scanning line G1 and the second
scanning line G2 and the first data line D1. The first scanning line G1
first transmits a scanning signal, and then the second scanning G2
transmit next scanning signal.

[0054] With reference to FIG. 4A, the sub-pixel display structure includes
a primary switch unit 10, a charge-sharing switch S3, a first electrode
portion 11 and a second electrode portion 12.

[0055] The primary switch unit 10 is electrically connected to the first
scanning line G1 and the first data line D1. The primary switch unit 10
is driven and switched on by the first scanning line G1. In this
embodiment, the primary switch unit is composed of a first switch S1 and
a second switch S2. The first switch S1 and the second switch S2 are
preferably thin-film transistors and mounted on the first scanning line
G1 to use the first scanning line G1 as a gate of the first switch S1 and
a gate of the second switch; in the meantime a source of the first switch
S1 and a source of the second switch S2 are electrically connected to the
first data line D1.

[0056] The charge-sharing switch S3 is electrically connected to the
second scanning line G2. The charge-sharing switch is driven and switched
on by the second scanning line G2. In this embodiment, the charge-sharing
switch S3 is preferably a thin-film transistor and is mounted on the
second scanning line G2 so as to use the second scanning line as a gate
of the charge-sharing switch S3; in the meantime a source of the
charge-sharing switch S3 is electrically connected to a drain (not shown
in the drawing) of the second switch S2 of the primary switch unit 10; a
drain of the charge-sharing switch S3 is electrically connected to a
voltage-dividing capacitor for performing charge sharing.

[0057] The first electrode portion 11 is electrically connected to the
primary switch unit 10. The first electrode portion 11 receives a gray
scale voltage transmitted by the first data line D1 when the primary
switch unit 10 is switched on. In this embodiment, the first electrode
portion 11 is electrically connected to the first switch S1 of the
primary switch unit 10, and is connected to a drain (not shown in the
drawing) of the first switch S1.

[0058] The second electrode portion 12 is electrically connected to the
primary switch unit 10 and the charge-sharing switch S3. The second
electrode portion 12 receives the gray scale voltage transmitted by the
first data line D1 when the primary switch unit 10 is switched on. In
this embodiment, the second electrode portion 12 is electrically
connected to the second switch S2 of the primary switch unit 10, and is
connected to a drain (not shown in the drawing) of the second switch S2.
And the drain of the second switch S2 is preferably electrically
connected to the second electrode portion via a conductive line 100,
wherein the conductive line 100 insulatedly extends over the first
electrode portion 11 and is connected to the second electrode portion 12
via a through hole 101. The drain of the charge-sharing switch S3 is also
electrically connected to the second electrode portion 12 via the through
hole 101 and further connected to the drain of the second switch S2 of
the primary switch unit 10 via the conductive line 100. In other words,
the second electrode portion 12 is electrically connected between the
second switch S2 and the charge-sharing switch S3. The second electrode
portion 12 further shares electric charges with the voltage-dividing
capacitor to which the charge-sharing switch S3 is connected when the
charge-sharing switch S3 is switched on so as to change the gray scale
voltage which the second electrode portion 12 originally received.

[0059] As shown in FIG. 4A, it is worth noting that at least one of the
first electrode portion 11 and the second electrode portion 12 is
connected to an extra electrode portion 13. And in the embodiment in FIG.
4A, it is the first electrode portion 11 that is connected to an extra
electrode portion 13 and the first electrode portion 11 is electrically
connected to the primary switch unit 10 via the extra electrode portion
13. Preferably the extra electrode portion 13 and the first electrode
portion 11 are integrally formed of a transparent conductive film.
Furthermore, each of the first electrode portion 11, the second electrode
portion 12 and the extra electrode portion 13 corresponds to four liquid
crystal domains with different liquid crystal pretilt angles.

[0060] With reference to FIG. 4A, it is worth noting that the first
electrode portion 11, the second electrode portion 12 and the extra
electrode portion 13 are disposed between the first scanning line G1 and
the second scanning line G2. Besides, the first electrode portion 11 and
the second electrode portion 12 preferably have a specific area ratio. In
this embodiment, the ratio of areas of the first electrode portion 11 and
the second electrode portion 12 is 3:7 or 4:6.

[0061] When the sub-pixel display structure of the present invention is
implemented in a 2D liquid crystal display panel, because the second
electrode portion 12 can further share electric charges with the
voltage-dividing capacitor to which the charge-sharing switch S3 is
connected when the charge-sharing switch S3 is switched on so as to
change the gray scale voltage which the second electrode portion 12
originally received, the first electrode portion 11 and the second
electrode portion 12 can have different gray scale voltage when
displaying images, and thereby effectively improving color washout
phenomenon under large viewing angles.

[0062] Besides, with further reference to FIG. 5A, when the sub-pixel
display structure of the present invention is implemented in a 3D liquid
crystal display panel which has a patterned phase retarder film, the
manufacturer can further dispose a black matrix 20 on a position
corresponding to the extra electrode portion 13 to shield the extra
electrode portion 13, the first scanning line G1 and the second scanning
line G2. In this way, an interval between a sub-pixel structure for
displaying left-eye images and a sub-pixel structure for displaying
right-eye images can be widened to avoid image crosstalk. Furthermore,
the first electrode portion 11 and the second electrode portion 12 still
can perform image display under different gray scale voltages via
foregoing charge-sharing structure so that the color washout problem
under large viewing angles of the 3D liquid crystal display panel having
a patterned phase retarder film still can be effectively improved.

[0063] The position and the size of the extra electrode portion may be
change based on requirement. For example, please refer to FIG. 4B, FIG.
4B is a schematic view of a second embodiment of the sub-pixel display
structure in accordance with the present invention, wherein the second
embodiment differ from the first embodiment in FIG. 4A in that: in FIG.
4B, the extra electrode portion 13 is connected to the second electrode
portion 12, thus, the second electrode portion 12 is electrically
connected to the charge-sharing switch S3 via the extra electrode portion
13. Preferably the extra electrode portion 13 and the second electrode
portion 12 are integrally formed of a transparent conductive film.
Furthermore, each of the first electrode portion 11, the second electrode
portion 12 and the extra electrode portion 13 corresponds to four liquid
crystal domains with different liquid crystal pretilt angles.

[0064] Besides, with further reference to FIG. 5B, similarly, when the
sub-pixel display structure of the present invention is implemented in a
3D liquid crystal display panel which has a patterned phase retarder
film, the manufacturer can further dispose a black matrix 20 on a
position corresponding to the extra electrode portion 13 to shield the
extra electrode portion 13, the first scanning line G1 and the second
scanning line G2 so as to satisfy the requirement of 3D viewing angles.
Furthermore, the first electrode portion 11 and the second electrode
portion 12 still can perform image display under different gray scale
voltages via foregoing charge-sharing structure so that the color washout
problem under large viewing angles of the 3D liquid crystal display panel
having a patterned phase retarder film still can be effectively improved.

[0065] With further reference to FIG. 4c, FIG. 4c is a schematic view of a
third embodiment of the sub-pixel display structure in accordance with
the present invention. The third embodiment differs from the first
embodiment of FIG. 4A and the second embodiment of FIG. 4B in that: in
FIG. 4c, the extra electrode portion 13 is divided into a first extra
electrode portion 13a and a second extra electrode portion 13b, wherein
the first electrode portion 11 is connected to the first extra electrode
portion 13a and electrically connected to the primary switch unit 10 via
the first extra electrode portion 13a; the second electrode portion 12 is
connected to the second extra electrode portion 13b and electrically
connected to the charge-sharing switch S3 via the second extra electrode
portion 13b. Preferably the first extra electrode portion 13a and the
first electrode portion 11 are integrally formed of a transparent
conductive film, and preferably the second extra electrode portion 13b
and the second electrode portion 12 are integrally formed of a
transparent conductive film. Furthermore, each of the first electrode
portion 11, the second electrode portion 12, the first extra electrode
portion 13a and the second extra electrode portion 13b corresponds to
four liquid crystal domains with different liquid crystal pretilt angles.

[0066] With further reference to FIG. 5c, similarly, when the sub-pixel
display structure of the present invention is implemented in a 3D liquid
crystal display panel which has a patterned phase retarder film, the
manufacturer can further dispose a black matrix 20 on positions
corresponding to the first extra electrode portion 13a and the second
extra electrode portion 13b to shield the first extra electrode portion
13a, the second extra electrode portion 13b, the first scanning line G1
and the second scanning line G2 so as to satisfy the requirement of 3D
viewing angles. Furthermore, the first electrode portion 11 and the
second electrode portion 12 still can perform image display under
different gray scale voltages via foregoing charge-sharing structure so
that the color washout problem under large viewing angles of the 3D
liquid crystal display panel having a patterned phase retarder film still
can be effectively improved.

[0067] By the above description, the present invention is to provide a
sub-pixel display structure having a first electrode portion and a second
electrode portion, wherein the second electrode portion can share
electric charges with a voltage-diving capacitor via a charge-sharing
switch, and at least one of the two electrode portions is further
connected to an extra electrode portion. When the sub-pixel display
structure is implemented in a 3D liquid crystal display panel having a
patterned phase retarder film, the manufacturer only needs to use a black
matrix to shield the extra electrode portion to satisfy the requirement
of 3D viewing angle to lower crosstalk phenomenon of left-eye and
right-eye images; in the meantime the first electrode potion and the
second electrode portion can remain operatable so that a color washout
phenomenon under large viewing angles can also be reduced even when the
sub-pixel display structure is used in a 3D liquid crystal display panel.
Besides, the sub-pixel display structure of the present invention only
needs to be connected to one data line to achieve the objective of
improving color washout problem under large viewing angles. Comparing
with the sub-pixel display structure in FIG. 3 that uses two data lines
at the same time, the present invention can relatively reduce the usage
of data driving chip (source driving chip) to further reduce the
manufacturing cost and power consumption of the liquid crystal display
panel.

[0068] The present invention has been described with a preferred
embodiment thereof and it is understood that many changes and
modifications to the described embodiment can be carried out without
departing from the scope and the spirit of the invention that is intended
to be limited only by the appended claims.